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Old 04-03-2009, 07:04 PM
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BBC cam question

I have a 60 over 427 with 14 to 1, closed,chambered heads( 290's) the valves are 225 and 188 , 6.135 rod length I would like to know what cam would work with this set up?? I am going to be using it for mud boggs. I would like to use a solid or roller cam. I also am using 1.7 roller rockers. any help would be greatly appreciated

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Old 04-03-2009, 07:17 PM
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If you can help me out with some flow figures on the heads, I can run it up on the DynoSim and find the best cam for you. Do you like a solid flat tappet grind or solid roller better?
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Old 04-03-2009, 07:37 PM
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I have no clue what the flow numbers would be sorry all I know is that they are stock heads no porting or anything has been done on them they have 225 and 188 valves and thats all I know
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Old 04-03-2009, 08:08 PM
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Well, let's just see what it COULD BE with a set of Canfield 305's using your valve sizes, Victor 454R with 1" spacer #8717 mounting 1,150 Dominator, and running on methanol....
http://www.compcams.com/Cam_Specs/Ca...?csid=510&sb=0
RPM HP TQ
3000 289 506
3500 364 547
4000 456 599
4500 551 643
5000 637 669
5500 710 678
6000 763 667
6500 806 651
7000 839 630
7500 848 594
8000 839 551

Found flow figures for 290 heads. Added 5% flow for big valves. Everything the same except 290 heads.....
RPM HP TQ
3000 293 512
3500 367 551
4000 449 590
4500 530 619
5000 596 626
5500 646 617
6000 683 598
6500 692 559
7000 690 517
7500 668 468
8000 630 413

Last edited by techinspector1; 04-03-2009 at 08:41 PM.
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Old 04-04-2009, 01:56 AM
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heads

those are 69 101 cc closed chamber heads. I would advise a lunati pn#60203 voodoo cam. if you need everything get the kit. This is a $145.00 cam and you will not be disappointed with the performance. The cam really tweaks between 3800 and 5200 rpm which is perfect for your application. I use these on heavier street cars (lead sleds) and have had no complaints. These cams are foolproof and are not prone to flatting out like some of the comp cam products. They do not bog and easily punch out from the lower rpm range. Not good below 1800 rpm though. There should be no clearance problems with whatever rockers you use either. The most awesome 268 cam ever produced! Out-powers all others! This High Performance street cam likes 2400 RPM stall, 800 cfm carb, dual plane intake and headers. Makes un-equaled power to 6200 RPM with proper valve springs.

* Advertised Duration (Int/Exh): 268/276
* Duration @ .050 (Int/Exh): 227/233
* Gross Valve Lift (Int/Exh): .542/.554
* LSA/ICL: 110/106
* Valve Lash (Int/Exh): Hyd/Hyd
* RPM Range: 1800-6200
maybe you can get a few dyno runs with this setup and see what happens
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Old 04-04-2009, 02:16 AM
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Quote:
Originally Posted by g&s restorod
those are 69 101 cc closed chamber heads. I would advise a lunati pn#60203 voodoo cam. if you need everything get the kit. This is a $145.00 cam and you will not be disappointed with the performance. The cam really tweaks between 3800 and 5200 rpm which is perfect for your application. I use these on heavier street cars (lead sleds) and have had no complaints. These cams are foolproof and are not prone to flatting out like some of the comp cam products. They do not bog and easily punch out from the lower rpm range. Not good below 1800 rpm though. There should be no clearance problems with whatever rockers you use either. The most awesome 268 cam ever produced! Out-powers all others! This High Performance street cam likes 2400 RPM stall, 800 cfm carb, dual plane intake and headers. Makes un-equaled power to 6200 RPM with proper valve springs.

* Advertised Duration (Int/Exh): 268/276
* Duration @ .050 (Int/Exh): 227/233
* Gross Valve Lift (Int/Exh): .542/.554
* LSA/ICL: 110/106
* Valve Lash (Int/Exh): Hyd/Hyd
* RPM Range: 1800-6200
maybe you can get a few dyno runs with this setup and see what happens
Perhaps you missed the part about 14.0:1 static compression ratio and mud bogs......
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Old 04-04-2009, 02:33 AM
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ooops

yeah that changes things a bit sorry i saw the mud bog but the missed the compression. okay try again..... how about this one
Needs 4500 RPM stall converter or better, headers, 11.5:1 compression ratio or better and 4.88 gearing.

* Advertised Duration (Int/Exh): 299/316
* Duration @ .050 (Int/Exh): 271/282
* Gross Valve Lift (Int/Exh): .669/.675
* LSA/ICL: 114/110
* Valve Lash (Int/Exh): .018/.026
* RPM Range: 4000-8000
* Includes: Cam Only

Part Number: 402B2LUN

Jobber Price: $196.41
I dont think there is a clearance issue here unless the heads have been shaved. This is also a solid lifter cam. (I am lazy and hate setting valves all the time) besides it gets oil on my pretty headers. Not a problem for mud boggers. I guess hot rodders are like sail boaters and mud boggers are power boaters....
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Old 04-04-2009, 06:15 PM
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sorry I forgot I am using a 1050 dominator and a edelbrock 454 victor jr intake
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Old 04-04-2009, 06:46 PM
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Quote:
Originally Posted by inquiring_mind2
sorry I forgot I am using a 1050 dominator and a edelbrock 454 victor jr intake
Close enough.
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Old 04-04-2009, 09:58 PM
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ok great thx I run 410 gears is that going to be a problem or Is it going to be ok. For the drive train I run a turbo 350 with a reverse manual valve body and for the transfer case I have the dana 300
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Old 04-04-2009, 11:16 PM
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Quote:
Originally Posted by inquiring_mind2
ok great thx I run 410 gears is that going to be a problem or Is it going to be ok. For the drive train I run a turbo 350 with a reverse manual valve body and for the transfer case I have the dana 300
Close enough.
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Old 04-05-2009, 08:24 AM
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ok great thx I appreciate all of the help you guys gave me. I will go out and get me that cam
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Old 04-05-2009, 09:26 PM
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I don't have a problem with anything that was said here, 4.10 is not a problem because with gear reduction through the transfer case it is anywhere from 13:1 to 43:1 (high or low) unless you are running some 52" boggers then you should be good to go.

If you install this cam you will need to make sure you don't have a valve to piston clearance problem. If you are going to spin it to 8,000 (the full potential of this cam) with stock rods you are going to need a lot of room (I wouldn't go less than .100 p/v clearance.

The best advice on cam selection would be to call comp cams and ask them what they think.
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Old 04-05-2009, 11:09 PM
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I am running eagle rods I have had the pistons notched for a comp cam with a lift of 629 so I should be OK on the p/v clearance
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Old 04-07-2009, 10:38 AM
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You will do much better with a solid roller. With all that compression and a short stroke that thing will want to turn and keep turning. Combined with a ****load of gearing and a greasy track the tach will jump quick. You said the pistons were cut for .629...she will want more lift than that. I think you will leave a lot on the table with the solid flat ya'll are talking about. If you put a little more into it now you'll be thankful later, stud girdle, good rockers, and the right springs. Oh yeah and don't forget p/v check
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